As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
VIBRATION MONITOR FOR THE LEFT LOW PRESSURE TURBINE, MAXED OUT AT 5.0 DURING CLIMB OUT WITH ASSOCIATED ENGINE HUM. DURING CRUISE FLIGHT 4.4 AND VIBRATION INDICATED. DURING DESCENT NOTICEABLE VIBRATION FELT AND HEARD ASSOCIATED WITH LEFT LPT HIGH VIBRATION INDICATION. REMOVED AND REPLACED THE NR 1 ENGINE ASSY IAW E1029.